Perhaps you should try some spelling variations:
hieu ve » hieu van
hieu va » lieu va, hieu qua
cam duc » cam xuc, cao duc, pham duc
va dinh » van dinh, va kinh, va tinh
ty ang » ty xang, ty hang, ty anh
ang xa » lang xa, mang xa, dang xay
va dan » ca dan, va dao, va dau
vi luu » vi lua
tru » truc

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: thuat xay ty ang xa hoi. ((hieu ve) or (hieu va)) cam duc ((va dan) or (va dinh)) vi luu tru~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thuat xay ty ang xa hoi. ((hieu ve) OR (hieu va)) cam duc ((va dan) OR (va dinh)) vi luu tru.
• Adding a wildcard symbol may retrieve word variants: thuat xay ty ang xa hoi. ((hieu ve) or (hieu va)) cam duc ((va dan) or (va dinh)) vi luu tru*.